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Wet Spinning Process of Lignin for Fiber Production
Category(s):
For Information, Contact:
Craig Forney
Commercialization Manager, Chemistry and Materials Sciences
515-294-4740
licensing@iastate.edu
Web Published:
5/5/2015
ISURF #
3959
Summary:
The technology enables an economical production of carbon fibers from biorenewable feedstock based on lignin, an abundant byproduct of paper manufacturing and cellulosic derived fuel.

Development Stage:
Iowa State University is looking for industry partners to bring this technology to market

Description:
Due to its complex interconnected structure, lignin is a very brittle biopolymer that cannot be spun, stretched or aligned, and spooled into fibers without modification. However, the potential use of lignin fibers as an economical, biorenewable carbon fiber precursor has made it an attractive compound for investigation.

Iowa State University researchers have devised a method to improve the processability of the lignin-based prescursor so that small diameter lignin fiber can be produced, spun, and stretched prior to pyrolysis into carbon fiber. In the proposed method a commonly available solvent plasticizes the lignin to a degree that allows spinning the resulting fiber into a coagulation bath which easily removes the solvent. Since no thermal or oxidative degradation has occurred during processing, the resulting fibers contain a very high concentration of lignin and are therefore relatively consistent in properties.

Advantage:
• Economical (feedstock is based on low cost, abundant by-product)
• Environmental (uses biorenewable feedstock)
• Simple (use of common fiber spinning technology)
Patent Information:
*To see the full version of the patent(s), follow the link below, then click on "Images" button.


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